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Figure 1
Holographic
Film
o
35mm Film
Object
Beam
Beam
Spliller
Reference Beam
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Mirror
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eighteen to twenty-four inches of length necessary to present
one 360° rotation. Larger sizes are available as special orders, but the cost makes them prohibitive to most theatre
organizations. Several commercial holographic companies
will produce such special orders, the usual price being from
$5,000-$25,000. Obviously this far exceeds the money most
~L-_La_se_r
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"Pafenf wars are currently making
if impossible fo gain informafion
on any projecfion sysfem and fear
is keeping much of fhe recenf
progress underground . .. "
Figure 2
Multiplex Hologram
Turntable
). rpm
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Light
Source
(100W Bulb)
theatres have available for a show's special effects. There
have been recent indications that the barrier of size, at least,
may be beginning to crumble. Companies such as Multiplex
Inco of San Francisco have been reported to be coming out
with 18" x 6' holograms. These new holograms would be
capable of reproducing up to three minutes of action. The
viewing plane would be greater than for nine-inch high holograms, but would still be far too narrow for viewing by a
theatre audience. However, time, technology, and imagination should eventually begin to solve these problems, and
multiplex holograms will find their place in theatre design.
Projected Holograms
As early as 1970, Dr. Dennis Gabor, the inventor of holography, applied for a patent on a holographic projection system. His concept is described in the 1973 NASA publication
on holography:
12
Theatre Design & Technology
US ITT/Fall, 1978

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